Cells are the smallest units of life capable of functioning independently and are the fundamental building blocks of all living organisms and body tissues.
Cell Structure and Function
According to biology, cells have distinct parts that carry out specific functions:
- Cell Membrane: This outer layer surrounds the cell and acts as a barrier, controlling which substances enter and exit.
- Nucleus: Often called the "control center," the nucleus houses the cell's genetic material (DNA).
- Cytoplasm: This gel-like substance fills the cell and contains various organelles, each with a specific job.
Importance of Cells
Cells are essential for life because:
- They carry out all life processes.
- They provide structure and support to organisms.
- They facilitate growth, repair, and reproduction.